import com.mysql.cj.jdbc.MysqlDataSource;

import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Scanner;

public class JDBCUpdate {
    public static void main(String[] args) throws SQLException {
        DataSource dataSource=new MysqlDataSource();
        ((MysqlDataSource)dataSource).setURL("jdbc:mysql://127.0.0.1:3306/java?characterEncoding=utf8&useSSL=false");
        ((MysqlDataSource)dataSource).setUser("root");
        ((MysqlDataSource)dataSource).setPassword("021226");
        Connection connection=dataSource.getConnection();
        Scanner scanner=new Scanner(System.in);
        System.out.println("请输入要修改的同学学号:");
        int id=scanner.nextInt();
        System.out.println("请输入要修改的同学姓名:");
        String name=scanner.next();
        String sql="update student set name=? where id=?";
        PreparedStatement statement=connection.prepareStatement(sql);
        statement.setString(1,name);
        statement.setInt(2,id);
        int n=statement.executeUpdate();
        System.out.println(n);
        statement.close();
        connection.close();
    }
}
